Reclassification out of Accumulated Other Comprehensive Income "AOCI" (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other comprehensive income (loss), net	$ (2,004.3)	$ 25.4	$ 242.5
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive, beginning balance	5,670.1
Other comprehensive income/(loss) before reclassification adjustments	(2,585.2)	10.3	348.1
Tax effect	561.0	14.4	(86.9)
Reclassification adjustments to net earnings	26.9	1.8	(24.7)
Tax effect	(7.0)	(1.1)	6.0
Accumulated Other Comprehensive, ending balance	3,225.3	5,670.1
Prior service credits recognized			17.0
Accumulated Other Comprehensive (Loss) /Income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive, beginning balance	10.6	(14.8)	(257.3)
Accumulated Other Comprehensive, ending balance	(1,993.7)	10.6	(14.8)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive, beginning balance	(226.8)	(322.2)	(269.2)
Other comprehensive income/(loss) before reclassification adjustments	(127.4)	95.4	(53.0)
Tax effect	0.0	0.0	0.0
Reclassification adjustments to net earnings	0.0	0.0	0.0
Tax effect	0.0	0.0	0.0
Accumulated Other Comprehensive, ending balance	(354.2)	(226.8)	(322.2)
Net Gains/(Losses) on Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive, beginning balance	390.9	680.4	224.6
Other comprehensive income/(loss) before reclassification adjustments	(2,228.0)	(363.3)	602.2
Tax effect	503.7	82.6	(136.4)
Reclassification adjustments to net earnings	4.4	(11.3)	(12.9)
Tax effect	(1.0)	2.5	2.9
Accumulated Other Comprehensive, ending balance	(1,330.0)	390.9	680.4
Cash Flow Hedging Activities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive, beginning balance	(29.9)	(30.3)	0.0
Other comprehensive income/(loss) before reclassification adjustments	0.0	(3.3)	(40.3)
Tax effect	0.0	0.8	10.0
Reclassification adjustments to net earnings	4.4	3.8	0.0
Tax effect	(1.1)	(0.9)	0.0
Accumulated Other Comprehensive, ending balance	(26.6)	(29.9)	(30.3)
Pension Liability
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive, beginning balance	(123.6)	(342.7)	(212.7)
Other comprehensive income/(loss) before reclassification adjustments	(229.8)	281.5	(160.8)
Tax effect	57.3	(69.0)	39.5
Reclassification adjustments to net earnings	18.1	9.3	(11.8)
Tax effect	(4.9)	(2.7)	3.1
Accumulated Other Comprehensive, ending balance	$ (282.9)	$ (123.6)	$ (342.7)